Vetrix has introduced VSTron, a free software synth for Windows that’s designed for creating special FX sounds.

Initially inspired by the Korg Monotron the VSTron includes 1 Osc ( Saw , Sine , Triangle , Ramp , Pulse , White Noise and Pink Noise ) and 1 VCF Osc with 4 modes ( Low Pass , High Pass , Band Pass , Band Reject ) as well as 1 Main Envelope .

To further modulate things you have 2 Envelopes and 2 LFO’s that can be individually assigned to different parameters and some built-in effects such as Drive , Delay and Chorus .